Did you know about this hidden design in Barcelona? It’s making the city safer and cleaner and cities worldwide are starting to copy it. It’s called a Superblock or ‘Superilla’, and it’s a 3 by 3 block area, where car parks and roads full of traffic are transformed into parks and playgrounds, communities can gather and socialise, and nature can thrive. Over 60% of Barcelona's public space was designed for cars, creating dangerous air pollution and leaving little room for people to actually live.